[dnsdist] dnsdist NOTIFY distribution

Martin Toth snowmailer at gmail.com
Tue Feb 26 16:07:25 UTC 2019


Thanks for your interest. I am using dnsdist as a loadbalancer and slave nodes are in DMZ behind dnsdist. Only dnsdist server has public IPs that can be reached from Master public IP (master is located in other datacentre).
Is my usecase not designed well? I thought dnsdist was designed to be used as LB for DNS services. Do you have any suggestions how to solve this or what workround should I use ?



> On 26 Feb 2019, at 16:59, Remi Gacogne <remi.gacogne at powerdns.com> wrote:
> Hi Martin,
> On 2/26/19 3:58 PM, Martin Toth wrote:
>> I just want to ensure myself how NOTIFY distribution in DNSDIST
>> exactly works. My setup looks like this - MASTER -> DNSDIST -> SLAVE
>> PDNSs (pool of 4 nodes)
>> My Question is if MASTER will send NOTIFY to DNSDIST, will DNSDIST
>> redistribute these NOTIFY to all SLAVES in DNSDIST backend? How to I
>> achieve situation that all slaves in dnsdist backend will be notified
>> of zone change on MASTER?
> I'm afraid you can't, dnsdist can route a query only to a single
> backend, with the exception of the TeeAction, but I would advise against
> trying to use it for that case.
> Is there a reason your master doesn't speak to the slaves directly?
> Best regards,
> -- 
> Remi Gacogne
> PowerDNS.COM BV - https://www.powerdns.com/
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